DOSAGE CALCULATIONS MADE
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy) — Oral Dosage Calculation
A client is prescribed amoxicillin 750 mg PO. Tablets available
contain 250 mg each.
How many tablets should the nurse administer?
A. 2 tablets
B. 2.5 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: C
Rationale:
Step 1: Set up dimensional analysis
[
750;mg \times \frac{1;tablet}{250;mg}
]
Step 2: Cancel units
mg cancels.
[
=\frac{750}{250}=3
]
Step 3: Solution
Administer 3 tablets.
,Medication Safety Note:
Always verify whether tablets are scored before splitting doses.
Question 2 (Easy) — Liquid Medication
The provider orders acetaminophen 480 mg PO.
Available:
Acetaminophen 160 mg/5 mL
How many milliliters should the nurse administer?
A. 10 mL
B. 12.5 mL
C. 15 mL
D. 20 mL
Correct Answer: C
Rationale:
Step 1
[
480;mg\times\frac{5;mL}{160;mg}
]
Step 2
, [
=\frac{2400}{160}=15;mL
]
Step 3
Administer 15 mL.
Medication Safety Note:
Use an oral syringe for accurate measurement when possible.
Question 3 (Easy) — Metric Conversion
Convert 2.5 g to milligrams.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C
Rationale:
Step 1
[
2.5;g\times\frac{1000;mg}{1;g}
]
EASY
SOLVING PROBLEMS USING
DIMENSIONAL ANALYSIS
8TH EDITION
• AUTHOR(S)GLORIA PEARL
CRAIG
TEST BANK
,Question 1 (Easy) — Oral Dosage Calculation
A client is prescribed amoxicillin 750 mg PO. Tablets available
contain 250 mg each.
How many tablets should the nurse administer?
A. 2 tablets
B. 2.5 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: C
Rationale:
Step 1: Set up dimensional analysis
[
750;mg \times \frac{1;tablet}{250;mg}
]
Step 2: Cancel units
mg cancels.
[
=\frac{750}{250}=3
]
Step 3: Solution
Administer 3 tablets.
,Medication Safety Note:
Always verify whether tablets are scored before splitting doses.
Question 2 (Easy) — Liquid Medication
The provider orders acetaminophen 480 mg PO.
Available:
Acetaminophen 160 mg/5 mL
How many milliliters should the nurse administer?
A. 10 mL
B. 12.5 mL
C. 15 mL
D. 20 mL
Correct Answer: C
Rationale:
Step 1
[
480;mg\times\frac{5;mL}{160;mg}
]
Step 2
, [
=\frac{2400}{160}=15;mL
]
Step 3
Administer 15 mL.
Medication Safety Note:
Use an oral syringe for accurate measurement when possible.
Question 3 (Easy) — Metric Conversion
Convert 2.5 g to milligrams.
A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg
Correct Answer: C
Rationale:
Step 1
[
2.5;g\times\frac{1000;mg}{1;g}
]
